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How do I enable or disable call forwarding on iPhone?

Learn how to forward calls from your main number to your M1 number-and how to turn it off when needed.

Lea Mendonca avatar
Written by Lea Mendonca
Updated over a week ago

Using the M1 app (Recommended) 📲

The easiest way to enable or disable call forwarding is directly through the M1 app:

To enable call forwarding ✅

  1. Open the M1 app and go to the Settings tab.

  2. Scroll to the M1 Number section.

  3. Under Incoming Calls, tap Set up Call Forwarding.

  4. Select your mobile provider from the list:

    • Verizon Wireless

    • T-Mobile

    • AT&T

    • Spectrum Mobile

    • Google Voice

    • Other

  5. Follow the on-screen steps to complete setup.

To disable call forwarding ❌

Follow the same steps above and turn off the call forwarding option for your provider.

⚠️ Important: Disable call forwarding if you’re deleting M1

If you’re removing the M1 app or canceling your subscription, make sure to turn off call forwarding first to avoid disruptions.


If it stays on, calls to your primary number may keep forwarding to M1-even if the app is no longer installed.

ℹ️ M1 cannot disable call forwarding for you-this must be done from your device, due to carrier restrictions.

Using iPhone Settings (alternative method) ⚙️

Enable ✅

  1. Open the Settings app on your iPhone.

  2. Scroll down and tap Phone.

  3. Tap Call Forwarding.

  4. Toggle it ON and enter your 10-digit M1 number.

  5. Tap the back arrow to save.

Disable ❌

  1. Follow the same steps above and toggle Call Forwarding to OFF.

Using carrier-specific codes (if Settings are unavailable)📞

If the Call Forwarding option is missing from your iPhone settings, you can use carrier-specific codes.

Enable ✅

  • For T-Mobile or AT&T:

    • Open the Phone app.

    • Dial *21* followed by your 10-digit M1 number, then press Call.

    • Example: *21*1234567890

  • For Verizon / Sprint / US Cellular / Boost / Cricket Wireless

    • Open the Phone app.

    • Dial *72 followed by your 10-digit M1 number, then press Call.

    • Example: *72 1234567890

Disable ❌

  • For T-Mobile:

    • Open the Phone app.

    • Dial ##21#, then press Call.

  • For AT&T:

    • Open the Phone app.

    • Dial #21#, then press Call.

  • For Verizon:

    • Open the Phone app.

    • Dial *73, then press Call.

  • For Sprint / US Cellular / Boost / Cricket Wireless

    • Open the Phone app.

    • Dial *720, then press Call.

*Replace 1234567890 with your M1 number.

ℹ️ Make sure to dial these codes from your iPhone's native Phone app, not from the M1 app.

Additional Carriers:

Google Fi

Enable ✅

  • Open the Google Fi app or go to the Google Fi website.

  • Navigate to Settings.

  • Select Call Forwarding and enter your M1 number.

Disable ❌

  • Remove or disable the forwarding number in the Call Forwarding settings.

Google Voice:

If you’ve previously tried forwarding your Google Voice number to M1, we recommend disabling it - since M1 does not officially support call forwarding from Google Voice at this time. Leaving it enabled can cause call delivery issues.

Disable ❌

  1. Visit voice.google.com and sign in to your Google account.

  2. In the top-right corner, click the ⚙️ Settings icon.

  3. In the Calls menu, scroll to the Linked numbers section.

  4. Find your M1 number and click Remove.

⚠️ Important Considerations

  • Verification: Always ensure that the forwarding number is entered correctly to prevent misdirected calls.

  • Carrier Restrictions: Some carriers may have specific restrictions or may require additional steps to enable or disable call forwarding. It’s advisable to consult your carrier’s support resources for detailed information.

  • Charges: While many carriers offer call forwarding as a free feature, some may charge for forwarded calls, especially if they are forwarded to numbers outside your local calling area. Check with your carrier to understand any potential charges.

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